U.S. patent application number 14/428462 was filed with the patent office on 2015-12-17 for nonaqueous method of dispersing a water soluble polymer.
The applicant listed for this patent is ROHM AND HAAS COMPANY. Invention is credited to Anne Oberlin.
Application Number | 20150361226 14/428462 |
Document ID | / |
Family ID | 49356524 |
Filed Date | 2015-12-17 |
United States Patent
Application |
20150361226 |
Kind Code |
A1 |
Oberlin; Anne |
December 17, 2015 |
NONAQUEOUS METHOD OF DISPERSING A WATER SOLUBLE POLYMER
Abstract
Described are methods of dispersing and hydrating a water
soluble polymer, comprising forming a nonaqueous slurry of one or
more polyethers, one or more water soluble polymer, and
hydrophobically modified ethoxylated urethane, provided that the
slurry contains less than five percent water. The nonaqueous slurry
can be put in contact with water to disperse and hydrate the water
soluble polymer.
Inventors: |
Oberlin; Anne; (Antibes,
FR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ROHM AND HAAS COMPANY |
Philadelphia |
PA |
US |
|
|
Family ID: |
49356524 |
Appl. No.: |
14/428462 |
Filed: |
October 2, 2013 |
PCT Filed: |
October 2, 2013 |
PCT NO: |
PCT/US2013/063017 |
371 Date: |
March 16, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61714369 |
Oct 16, 2012 |
|
|
|
Current U.S.
Class: |
524/733 |
Current CPC
Class: |
C08J 3/07 20130101; C08L
1/284 20130101; C08L 1/286 20130101; C08L 1/286 20130101; C08J 3/11
20130101; C08J 3/09 20130101; C08J 2301/04 20130101; C08L 1/288
20130101; C08L 1/28 20130101; C08L 71/02 20130101; C08L 1/288
20130101; C08L 75/08 20130101; C08L 1/284 20130101; C08L 71/02
20130101; C08J 3/03 20130101; C08L 71/02 20130101; C08L 75/08
20130101; C08L 75/08 20130101; C08L 71/02 20130101; C08L 75/08
20130101; C08L 1/28 20130101 |
International
Class: |
C08J 3/07 20060101
C08J003/07 |
Claims
1. A method of dispersing and hydrating a water soluble polymer,
comprising: forming a nonaqueous slurry of one or more polyethers,
one or more water soluble polymers, and hydrophobically modified
ethoxylated urethane, provided that the slurry contains less than
five percent water; and then contacting the nonaqueous slurry with
water to disperse and hydrate the water soluble polymer.
2. The method of claim 1, wherein the water soluble polymer is a
water soluble modified cellulose ether selected from the group
consisting of: alkyl cellulose derivatives, hydroxyalkyl cellulose
derivatives, cationic hydroxyalkyl cellulose derivatives (the
cationic specie being a quaternary alkyl amine) and carboxylalkyl
cellulose derivatives.
3. The method of claim 1, wherein the water soluble polymer is
selected from the group consisting of: hydroxyethyl cellulose,
cationically-modified hydroxyethylcellulose,
hydroxypropylmethylcellulose, and polyethylene oxide.
4. The method of claim 1, wherein the method is performed without
addition of heat.
5. The method of claim 1, wherein the polypropylene glycol is
Tripropylene Glycol Methyl Ether.
6. A nonaqueous slurry consisting essentially of: polypropylene
glycol or polyethylene glycol, at least one of hydroxyethyl
cellulose, cationically-modified hydroxyethylcellulose,
hydroxypropylmethylcellulose, and polyethylene oxide, and
hydrophobically modified ethoxylated urethane, provided that the
slurry contains less than five percent water.
7. A personal care composition containing water soluble polymer,
formed by the method of claim 1.
8. A fabric care composition containing water soluble polymer,
formed by the method of claim 1.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] This application claims priority from U.S. Provisional
Patent Application No. 61/714,369, filed Oct. 16, 2012, which is
incorporated herein by reference in its entirety.
FIELD
[0002] The present invention relates to methods and compositions
for dispersion of water soluble polymers.
BACKGROUND
[0003] Many water soluble polymers (cellulose, cellulose
derivatives, gums, and the like) are typically sold in solid, dry,
form, and hence powder handling and processing properties are
extremely important. For example, a low dust content is desirable.
Also, the ability of the dry powder to be poured from a container
or receptacle is described as flowability. Flowability is affected
by particle shape and size distribution, and resulting bulk
density. Bulk density is the mass of powdered solid material per
unit of volume occupied. Acceptable flowability generally depends
upon relatively high bulk density and relatively low angle of
repose. The angle of repose is the maximum angle between the slope
of a conical discharged pile of powder and the surface it rests
upon, a lower angle representing a more widely spread pile.
[0004] As part of using the water soluble polymer in its various
applications, the water soluble polymer must be dissolved.
Dissolution is frequently described as a process with two
overlapping phenomena, dispersion and hydration. Dispersion refers
to spreading of particles or groups of polymer chains throughout
the solution. Hydration refers to loosening of the polymer chains
and expansion of their hydrodynamic volume (and corresponding
viscosity buildup). If dispersion is poor, or if hydration outpaces
dispersion, hydrated polymer can swell and isolate relatively dry,
non-hydrated polymer from the solution, forming lumps. Desirable
dispersion and hydration are normally characterized by little to no
lump formation and a rapid viscosity build up over time,
respectively.
[0005] Accordingly, there is a need in the industry to reduce the
foregoing problems (dust, variable flow, inconsistent dispersion,
or undesirable rate of hydration) in order to simplify formulation
of products incorporating water soluble polymers.
DETAILED DESCRIPTION
[0006] In one embodiment, the present invention provides a method
of dispersing and/or hydrating a water soluble polymer, comprising
forming a nonaqueous slurry of one or more polyethers, one or more
water soluble polymers, and hydrophobically modified ethoxylated
urethane, provided that the slurry contains less than five percent
water. The nonaqueous slurry can be put in contact with water to
disperse and hydrate the water soluble polymer.
[0007] The term "polyether" means an oxygenated solvent or polyol.
It is contemplated that the polyether may include methyl ether
and/or propyl ether units in its composition, and/or be a
polyglycol copolymer of ethylene oxide and propylene oxide.
[0008] In one embodiment, the water soluble polymer is at least one
water-soluble, film-forming natural and synthetic polymers
including alkylcellulose ethers, hydroxyalkyl cellulose ethers and
hydroxyalkyl alkylcellulose ethers, including methylcellulose;
hydroxypropyl methylcellulose (HPMC); hydroxyethyl methylcellulose
(HEMC); hydroxyethyl cellulose (HEC); hydroxypropyl
hydroxyethylcellulose (HPHEC) and hydroxypropylcellulose (HPC),
water-soluble, high molecule weight polymers of ethylene oxide,
preferably of about 20,000 molecular weight or higher; natural
products such as guar gum, xanthan gum and water-soluble thickening
agents. Preferably, the water soluble polymer is a water soluble
modified cellulose ether selected from the group consisting of:
alkyl cellulose derivatives, hydroxyalkyl cellulose derivatives,
cationic hydroxyalkyl cellulose derivatives (the cationic specie
being a quaternary alkyl amine) and carboxylalkyl cellulose
derivatives. In one embodiment, the water soluble modified
cellulose ether is not a hydration-retarded (surface-treated)
grade. Preferred water soluble polymers are hydroxyethyl cellulose
(available under the tradename CELLOSIZE from The Dow Chemical
Company), cationically-modified hydroxyethylcellulose (cat-HEC),
hydroxypropylmethylcellulose (available under the tradename
METHOCEL from The Dow Chemical Company), and polyethylene oxide
(available under the tradename POLYOX from The Dow Chemical
Company).
[0009] Hydrophobically modified ethoxylated urethane (HEUR) has a
MW between 20,000 to 80,000 g/mol. In one embodiment, the
hydrophobically modified ethoxylated urethanes is ACUSOL.TM. 880
from the Dow Chemical Company.
[0010] In one embodiment, the non aqueous slurry has less than 4%,
preferably less than 3%, and more preferably less than 2%
water.
[0011] In one embodiment, the present invention provides a non
aqueous slurry consisting essentially of one or more polyethers,
one or more water soluble polymers, and hydrophobically modified
ethoxylated urethane, provided that the slurry contains less than
five percent water. In one embodiment, the non aqueous slurry is
phosphate free. In one embodiment, the non aqueous slurry is oil
free. In one embodiment, the non aqueous slurry is surfactant
free.
[0012] The present invention speeds dissolution of water soluble
polymers in water, and accordingly finds use in personal care and
fabric care applications, where water soluble polymers are hydrated
and incorporated into personal care or fabric care formulations. In
one embodiment, formulation time is decreased due to faster
dissolution.
EXAMPLES
Example 1
[0013] A nonaqueous slurry of the present invention is described in
TABLE 1 in weight percent:
TABLE-US-00001 TABLE 1 Batch 1 Batch 2 Batch 3 Batch 4 Batch 5
Batch 6 POLYGLYCOL P-400 E 72.3 72.3 72.3 72.3 72.3 72.3
polypropylene glycol Acusol 880 (35% active) 7.7 7.7 7.7 7.7 7.7
7.7 hydrophobically modified ethoxylated urethane CELLOSIZE QP100MH
20 -- -- -- -- -- hydroxyethyl cellulose CELLOSIZE WP3000 -- 20 --
-- -- -- hydroxyethyl cellulose* Cationic hydroxyethyl cellulose --
-- 20 -- -- -- Cationic hydroxyethyl cellulose* -- -- -- 20 -- --
METHOCEL 40-202 HPMC -- -- -- -- 20 -- POLYOX WSR N80 -- -- -- --
-- 20 Polyethylene oxide Batch 7 POLYGLYCOL P-400 E --
polypropylene glycol Carbowax PEG-400 E 72.3 polyethylene glycol
Acusol 880 (35% active) 7.7 hydrophobically modified ethoxylated
urethane CELLOSIZE QP100MH -- hydroxyethyl cellulose CELLOSIZE
WP3000 -- hydroxyethyl cellulose* Cationic hydroxyethyl cellulose
-- Cationic hydroxyethyl cellulose* 20 METHOCEL 40-202 HPMC --
POLYOX WSR N80 -- Polyethylene oxide *surface treated
[0014] At room temperature, polypropylene glycol or polyethylene
glycol in a 200 mL plastic beaker is stirred at 500 rpm (Heidolph
RZR 2020 agitator from Heidolph, Germany and a four square blades
propeller, from KA Werke, Germany). Then, hydrophobically modified
ethoxylated urethane is added under agitation at 500 rpm and
stirred until completely dissolved, forming an opalescent mixture.
Still under 500 rpm agitation, the water soluble polymer is added
slowly, and the agitation continued at 500 rpm for 10-15 minutes to
form a non-aqueous slurry.
Example 2
[0015] Batches 1-7 were made substantially according to Example 1,
and tested. Visually, the six formulations presented no phase
separation after 1 week of storage either at room temperature,
4.degree. C., or 40.degree. C.
[0016] Batch 3 was selected for further characterization, viscosity
using a Brookfield DV III Ultra programmable rheometer, with the
spindle #64, as shown in TABLE 2:
TABLE-US-00002 TABLE 2 rpm 6 3 6 12 30 60 Day 1 viscosity (cPs) 59
000 14 200 8 200 4 950 2 560 1 690 22.5.degree. C. % torque 5.9 7.1
8.2 9.9 12.8 16.9 +4 weeks viscosity (cPs) 60 000 10 000 6 350 3
440 3 440 2 280 23.5.degree. C. % torque 6 8.4 10.1 12.7 17.2
22.8
[0017] After 4 weeks, Batch 3 still had no phase separation and the
viscosity indicates the slurry is stable.
Example 3
[0018] Batches 1-5 were made substantially according to Example 1,
and tested for dissolution versus the corresponding untreated water
soluble polymer, all at 2% concentration. Results are presented in
TABLE 3.
TABLE-US-00003 TABLE 3 Observations Batch 1 Good: homogeneous,
opalescent Batch 2 Good: homogeneous, opalescent Batch 3 Good:
homogeneous, opalescent Batch 4 Good: homogeneous, opalescent Batch
5 Good: homogeneous, opalescent Comparative Poor: opaque CELLOSIZE
QP100MH hydroxyethyl cellulose Comparative Poor: opaque CELLOSIZE
WP3000 hydroxyethyl cellulose * Comparative Failed: gel formation
Cationic hydroxyethyl cellulose Comparative Failed: gel formation
Cationic hydroxyethyl cellulose * Comparative Failed: gel formation
METHOCEL 40-202 HPMC
[0019] 10 g of each inventive slurry listed (effectively containing
2 g of water soluble polymer) were placed in 90 g deionized water
and agitated 2 min (after polymer addition) at 500 rpm using an
Overhead agitator, Heidolph RZR 2020 from Heidolph, Germany.
[0020] 2 g of the listed conventional cellulose ethers were placed
in 98 g deionized water and agitated 2 min (after polymer addition)
at 500 rpm using an Overhead agitator, Heidolph RZR 2020 from
Heidolph, Germany.
[0021] Each solution was evaluated by a trained panelist for
evidence of dissolution problems known to those skilled in the art
(fish-eyes, gel formation, opaqueness). The conclusion was that the
present invention offered faster and easier dissolution.
* * * * *